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【单选题】
电路如图，利用等效变换求U ab =（ ）。【图片】A.
-3V
B.
5V
C.
-2V
D.
4V
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【简答题】According to your understanding, is reciting English phrases useful or not to English study?
【单选题】在Excel中,默认情况下,输入日期:2019/1/16时,单元格中显示的格式是( )。
A.
2019/1/16
B.
1/16/2019
C.
2019-1-16
D.
1-16-2019
【简答题】According to your understanding, is reciting English phrases useful or not to English study?
【判断题】Tell whether the following sentences (No. 13-18) are right according to English grammatical rules.It seems to me that neither of the business partners are entirely right on any issue.
A.
正确
B.
错误
【判断题】According to English usage, the following sentence is often used: This house is to be let.
A.
正确
B.
错误
【多选题】What are the exact purposes for English learners to learn English according to the author?
A.
To live in a foreign country.
B.
To raise one's standard of living.
C.
To be competitive in today's globalized society.
D.
To work for a multinational company.
E.
To become an interpreter or concierge.
【简答题】（2011?潍坊）分解因式：a 3 +a 2 ﹣a﹣1=_______________
【单选题】According to the passage, it is ______ to translate great European operas to English.
A.
difficult
B.
easy
C.
valuable
D.
necessary
【简答题】1According to your understanding, is reciting English phrases useful or not to English study?
【单选题】默认情况下,输入日期2019/1/16,单元格内显示的格式为( )。
A.
2019/1/16
B.
1/16/2019
C.
2019-1-16
D.
1-16-2019
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